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Information × Registration Number 0226U000310, (0124U000131) , R & D reports Title Development of breeding parameters of a model confectionary sunflower hybrid for stressful conditions in the Left-Bank Forest-Steppe of Ukraine popup.stage_title Розроблення селекційних параметрів модельного гібрида кондитерського соняшнику для стресових умов Лівобережного Лісостепу України Head Makliak Kateryna M., Доктор сільськогосподарських наук Registration Date 07-01-2026 Organization Institute of Plant Breeding named after V. Ya. Yuriev of the National Academy of Agrarian Sciences of Ukraine popup.description1 The purpose is to scientifically and practically justify the parameters of a model confectionery sunflower hybrid for the stressful conditions in the Left-Bank Forest-Steppe of Ukraine, including expression levels of economic, biological, and morphological features, confectionery qualities of seeds, and their acceptable variability under stressful conditions popup.description2 The study object was breeding parameters of a model confectionery sunflower hybrid. The purpose of the study was to scientifically and practically justify the parameters of a model confectionery sunflower hybrid for the stressful conditions of the Left-Bank Forest-Steppe of Ukraine, which include levels of expression of economic, biological and morphological traits and confectionery qualities of seeds, as well as their acceptable stress-induced variations. Field, laboratory, and statistical methods were used. In 2024-2025, the following variants were explored: 60 hybrids at a plant density of 57,100 plants/ha; 40 hybrids at a plant density of 28,600 plants/ha; and 60 hybrids at a plant density of 20,400 plants/ha. The basic characteristics of the model confectionery sunflower hybrid were determined: lengths of interphase periods, plant height, head diameter, seed yield, test weight, achene length, yield of large seed fraction (4.0+/4.5+), capacity for hulling; kernel quality, oil content in achenes, seed number in the head center, uniformity of seeds, resistance to shedding and lodging of plants. Regression analysis with the datum thousand-seed weight of 110 g gave the following mean values for the confectionery hybrid for arid conditions of the eastern Forest-Steppe: seed yield - 2.32 t/ha; length of the "emergence-anthesis" period - 60 days; husk content - 32.7%. Confectionery hybrid ‘IR Akhill’ was submitted for the state qualifying examination in 2026. The following hybrids and lines were included in the State Register of Plant Varieties Suitable for Dissemination in Ukraine: line ‘Kh66B’, a parental component of confectionery hybrids, in 2024; confectionery hybrid ‘IR Chudovyi’ and line- sterility fixer ‘Kh146B’, a parental component of hybrids for dual purposes, in 2025. The results were reported in abstracts of three conferences, scientific and practical guidelines, a state registration certificate, and a patent for plant variety. Product Description popup.authors Nina M. Leonova Valeriia P. Kolomatska Valentyna I. Syvenko Oleh H. Suprun Borys P. Shepilov Viktor V. Andriienko Viktor V. Kyrychenko Nadiia V. Kuzmyshena Tetiana M. Kyrash Serhii A. Chumachenko Dmytro V. Kurylych popup.nrat_date 2026-01-07 Close